'Hide your tie in your bag,' Kate said to Lisa, as they ascended the travelator with the other shoppers. Lisa looked at her suspiciously. 'Why?' Kate Maguire tutted and rolled her eyes. 'Because we're nicking off, you idiot! Hyperville's packed with CCTV. Anybody spots us, we'll be slung out!' 'Oh. Right.' Lisa Henshaw looked abashed, and pulled her St Mary's School tie off and shoved it into her bag.